A large proportion of healthy African Americans have been observed to have a white blood cell count (WBC) that is persistently lower than the normal range defined for individuals of European ancestry [1]â[5].
Energy is only released when chemical bonds are formed. In general, a chemical reaction involves two steps: 1) the original chemical bonds between the atoms are broken, and 2) new bonds are formed. These two steps are sometimes lumped into one event for simplicity, but they are really two separate events.
There is less energy stored in the chemical. bonds in the products than there was in the reactants. Chemical reactions that release energy are called. exothermic reactions. Chemical reactions in which energy is absorbed from. the surroundings are called endothermic reactions. There. is more energy âstoredâ in the chemical bonds of the. products than there was in the reactants.